Facilitated temporal summation of pain at spinal level in Parkinson's disease

Background: Pain is one of the major nonmotor symptoms of Parkinson's disease. We hypothesized that Parkinson's disease patients could show an early diffuse abnormal processing of the nociceptive inputs also in the absence of clinical pain syndrome and that this could represent the physiop...

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Veröffentlicht in:Movement disorders 2011-02, Vol.26 (3), p.442-448
Hauptverfasser: Perrotta, Armando, Sandrini, Giorgio, Serrao, Mariano, Buscone, Simona, Tassorelli, Cristina, Tinazzi, Michele, Zangaglia, Roberta, Pacchetti, Claudio, Bartolo, Michelangelo, Pierelli, Francesco, Martignoni, Emilia
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container_end_page 448
container_issue 3
container_start_page 442
container_title Movement disorders
container_volume 26
creator Perrotta, Armando
Sandrini, Giorgio
Serrao, Mariano
Buscone, Simona
Tassorelli, Cristina
Tinazzi, Michele
Zangaglia, Roberta
Pacchetti, Claudio
Bartolo, Michelangelo
Pierelli, Francesco
Martignoni, Emilia
description Background: Pain is one of the major nonmotor symptoms of Parkinson's disease. We hypothesized that Parkinson's disease patients could show an early diffuse abnormal processing of the nociceptive inputs also in the absence of clinical pain syndrome and that this could represent the physiopathological substrate to explain the high incidence of diffuse pain symptoms. Materials and methods: We used the temporal summation threshold of the nociceptive withdrawal reflex and the related pain sensation to evaluate the facilitation in pain processing at spinal level. Fifteen (7 Women; 8 Men; mean age 63.0 ± 9.1) Parkinson's disease patients without clinical pain and 12 (6 Women, 6 Men; mean age 61.2 ± 4.2) healthy subjects were recruited. Parkinson's disease group has been subdivided into two subgroups, 7 early‐stage Parkinson's disease patients with unilateral signs (Hoehn and Yahr stage 1) and 8 patients in a more advanced stage of the disease showing bilateral parkinsonian signs (Hoehn and Yahr stages 2 and 2.5), both “on” and “off” treatments with levodopa. Results: A significant facilitation in temporal summation of pain (reduced temporal summation threshold and increased painful sensation) was found in Parkinson's disease patients when compared with controls. This facilitation is more evident in Parkinson's disease with bilateral signs and on the side more affected in Parkinson's disease with unilateral signs. Levodopa administration failed to significantly modify the neurophysiological abnormalities; however, a slight improvement has been detected. Conclusions: The increased gain in pain processing at spinal level in Parkinson's disease patients could be a consequence of the degenerative phenomena involving supraspinal projections implicated in the modulation of pain processing and could make Parkinson's disease patients more predisposed to develop a pain condition. © 2010 Movement Disorder Society
doi_str_mv 10.1002/mds.23458
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We hypothesized that Parkinson's disease patients could show an early diffuse abnormal processing of the nociceptive inputs also in the absence of clinical pain syndrome and that this could represent the physiopathological substrate to explain the high incidence of diffuse pain symptoms. Materials and methods: We used the temporal summation threshold of the nociceptive withdrawal reflex and the related pain sensation to evaluate the facilitation in pain processing at spinal level. Fifteen (7 Women; 8 Men; mean age 63.0 ± 9.1) Parkinson's disease patients without clinical pain and 12 (6 Women, 6 Men; mean age 61.2 ± 4.2) healthy subjects were recruited. Parkinson's disease group has been subdivided into two subgroups, 7 early‐stage Parkinson's disease patients with unilateral signs (Hoehn and Yahr stage 1) and 8 patients in a more advanced stage of the disease showing bilateral parkinsonian signs (Hoehn and Yahr stages 2 and 2.5), both “on” and “off” treatments with levodopa. Results: A significant facilitation in temporal summation of pain (reduced temporal summation threshold and increased painful sensation) was found in Parkinson's disease patients when compared with controls. This facilitation is more evident in Parkinson's disease with bilateral signs and on the side more affected in Parkinson's disease with unilateral signs. Levodopa administration failed to significantly modify the neurophysiological abnormalities; however, a slight improvement has been detected. 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Parkinson's disease group has been subdivided into two subgroups, 7 early‐stage Parkinson's disease patients with unilateral signs (Hoehn and Yahr stage 1) and 8 patients in a more advanced stage of the disease showing bilateral parkinsonian signs (Hoehn and Yahr stages 2 and 2.5), both “on” and “off” treatments with levodopa. Results: A significant facilitation in temporal summation of pain (reduced temporal summation threshold and increased painful sensation) was found in Parkinson's disease patients when compared with controls. This facilitation is more evident in Parkinson's disease with bilateral signs and on the side more affected in Parkinson's disease with unilateral signs. Levodopa administration failed to significantly modify the neurophysiological abnormalities; however, a slight improvement has been detected. Conclusions: The increased gain in pain processing at spinal level in Parkinson's disease patients could be a consequence of the degenerative phenomena involving supraspinal projections implicated in the modulation of pain processing and could make Parkinson's disease patients more predisposed to develop a pain condition. © 2010 Movement Disorder Society</abstract><cop>Hoboken</cop><pub>Wiley Subscription Services, Inc., A Wiley Company</pub><pmid>21462260</pmid><doi>10.1002/mds.23458</doi><tpages>7</tpages></addata></record>
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subjects Adult
Aged
Antiparkinson Agents - therapeutic use
Biological and medical sciences
Degenerative and inherited degenerative diseases of the nervous system. Leukodystrophies. Prion diseases
Disability Evaluation
Female
Humans
Levodopa - therapeutic use
Male
Medical sciences
Middle Aged
Movement disorders
Neurology
nociceptive withdrawal reflex
pain
Pain - drug therapy
Pain - etiology
Pain - pathology
Pain Measurement
Pain Threshold - drug effects
Pain Threshold - physiology
Parkinson Disease - complications
Parkinson Disease - drug therapy
Parkinson's disease
Physical Stimulation
Psychophysics - methods
Reflex - physiology
Severity of Illness Index
Spinal Cord - physiopathology
temporal summation
title Facilitated temporal summation of pain at spinal level in Parkinson's disease
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